Further Information

The D931 provides the accuracy of a fixed orifice performance, all within one valve, saving you time trouble and money over a traditional commissioning set. The D931 represents the best value balancing option.

This download include all size variations of the D931 Fixed Orifice Double Regulating Valve (FODRV) from Crane Fluid Systems.

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Other peoples comments

Does not work when incorporated into a system with flow rates.
Does not take advantage of calculated parameters to allow engineering data for valves to be extracted, i.e. pressure drop and design valve settings.